first of all, there is a cheat book that shows you all the Pokemon from your normal pokedex. But if you're sure, then go back to professor rowan, and talk to him.
you cant get every Pokemon be4 you get the national dex
You cant unless you have a national pokedex and migrate a pokemon.
you cant find it, you have to see all the Pokemon sapphire.
You can catch a Skitty in Pokemon Pearl by completing the game and getting a National Dex. When you have the National Dex, talk to the little girl in Sandgem Town. Everyday, a different Pokemon appears in the Sinnoh region. Skitty will appear on a random day.
You don't have to see Heatran in order to complete it.
you cant he was in the sinnoh part of the national dex witch i have in Pokemon platinum
cant cant cant
You cant.
you cant get to sinnoh in heart gold, but you can find the gym leaders from sinnoh.
you cant bulbasoar is not a sinnoh Pokemon
you cant go to sinnoh you have to stay in that regin
You cant!
You have to finish the Sinnoh 'Dex, then you go to the Professor guy and he will upgrade to National 'Dex. Then you can do the Pal Park.
No but you can go to kanto but you can own sinnoh pokemon.you cant
You cant go to kanto in the sinnoh Pokemon games.
You need to obtain data (see not capture) on all 150 Sinnoh Pokémon. I would recomend that you battle all possible trainers in the game to get your pokédex up also to see Dialga you must trade it from diamond.
All the Sinnoh pokemon and Unova arent available.